SK162492A3 - Paste for injection and method of its manufacture - Google Patents

Abstract

An injection grout for sealing and/or consolidating soils or materials exhibiting a very low permeability, of the type consisting of the mixture of a powder based on slag in suspension in water and of a silica liquor. The silica liquor has an SiO2/Na2O molar ratio lower than 0.8 and a silica content of between approximately 0.01 and 5 % by weight. The invention also relates to a process for its manufacture.

Description

Ιία / Μ mu YsÍycĹoY ^^ O q 'Š / fooí f ^& j;

g.b, ia8, t-tech.

The present invention relates to impregnations for impermeability and / or nobody hardening materials or materials having a very low propuotnoeth, of the type consisting of an Etruscan dust suspended in a conductor and a silica solution. The invention further relates to a method for producing a carriage as defined above.

The applicant 18 in his European patent application numbered 0 336 82? popeal slurry for aeration produced by blending and frothing dust from the blast furnace blasted in water and from the silica solution with a ratio of silica to sodium oxide of less than 2 and a silica content of less than 10% by weight

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This yeast slurry gives generally satisfactory results, but may sometimes have insufficient achopnoat spots in ptds or in materials having a very low throughput, such as 10 ^ ^ β.Γ \

Accordingly, it is an object of the present invention to provide an improved slurry as described in European Patent Application 0 33b 32 in order to be able to carry out the injection in soils or materials having a very low propuate.

Podetato vYnélgzu

SUMMARY OF THE INVENTION The present invention addresses the challenge of providing an injection wick to form impermeable and / or hardening soils or very low permeability materials, of the type seated from the wetting of Etruscan dust suspended in a conductor and a silica solution, the essence of which is an oxide solution. The silica has a molar ratio of silica to sodium oxide of less than 0.8 and a silica content of from 0.01 to 5% by weight.

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The slurry of the present invention has the advantage that it is possible. In addition, it is easy and cheap to produce < RTI ID = 0.0 > 8e < / RTI > allows for the formation of nepropuatnoati and / nobo soil hardeners and very low permeability.

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It is known that ketones are not generally stable, or their particles have a strong tendency not to use auapent in water and to act as a result,

For the stabilization of the lacquer suction, cloves of cloves are necessary

- supply sufficient liquid stiffness in which the slag particles are suspended.

The silica solutions previously described by the Applicant and having a silica content greater than 10% by weight make it possible to use a solution of silica. to obtain stiffnesses that stabilize the slurry, but the stiffness thus obtained is often too high to allow satisfactory injections into the finest breakdowns of materials or materials.

In addition, as the stiffness of the injected slurry increases, the injection pressure must be increased and the ability of the suspension to penetrate the soil is reduced.

Experience gained by the applicant has shown that using a silica solution having a silica to sodium molar ratio of less than 0,8 and a silica content of the solution of less than 5% by weight, sufficient rigidity is obtained to keep the slurry still stable after injection without significantly reducing the ability of the slurry to enter the micropores or microcracks of the environment into which the slurry is injected.

According to one embodiment of the present invention, the slurry according to the invention is preferably produced by mixing the three components mentioned below.

The first component is blast furnace slag dust dispersed in water containing a dispersant.

This dust, for example from slag, slag cement or any other slag-containing product, preferably has a particle size of less than 15 µm, for example 10 µm or less.

Such a suspension can be obtained, in particular, according to the French patent application of the same applicant 85 08886 or 90 12703.

The second slurry component of the present invention is a silica solution obtained by dissolving in sodium, which is preferably in the form of a solution of 35-37 ° B, a silica dust or silica product having a particle size preferably less than 10 µm and preferably less than 50 µm. um.

The third component is a filler suspension, which may consist of any fine dust selected according to the properties to be modified.

In particular, calcium carbonate, magnesium carbonate, double magnesium-calcium carbonate such as dolomite, or some inert filler may be used.

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By the choice of filler, it is possible to modify the density of the sermon, hence the resulting mechanical strength and physical stability as well as its pB.

According to one preferred embodiment of the present invention, scaling is used as a filler to allow the solids to solidify after solidification and to lower the pH and improve the pH and whiteness.

In one embodiment, the filler may be non-composite Fine® cement

The present invention may also contain a fourth component, which is a diopergic agent selected from the group consisting of naphthalenaulfonates, melamine and derivatives thereof.

A mixture of the three basic components of the component according to the present embodiment of the present invention allows to adjust the properties of the component after solidification, wherein the component is present in the composition. The relative proportions of items can be reduced.

When ae in lac deer! The three components increase the proportion of Etruscan, increasing the stability and strength of the vats after solidification and also does not smell the permeability.

For example, the product of Etruscan may be from blast furnace dust, string cement containing, for example,% 35% Etruscan 15 or a clinker, or any other product from a product that has a sufficient Etruscan content.

By increasing the proportion of the silica solution and increasing the stability of the slurry, the solid state after solidification without substantially changing its permeability.

Increasing the ratio of silica to sodium oxide and increasing the stability of the slurry without affecting strength and permeability after solidification ·

Increasing the filler content to processes for increasing the stability of F CASS without substantial saaSny strength after solidification _y decreases in & if propuatnost.

The cheese found in the inventive®®, having a initial pH of 13 / 13.5, having a solidification of ‘p8 equal to 12A2.5, is a pH comparable to ducks plundered with Portlond cements.

This lack of pH after solidification of the vats is particularly pronounced when using magnesium-containing fillers, such as dolomite, which surprisingly have been shown to be more effective than carbonates to achieve a pH reduction after solidification.

According to one embodiment of the invention, the duck does not contain a filler suspension, the stability can be reduced and its permeability increased.

According to the present invention, it is desirable that the particles were introduced into the slurry as little as possible, for example less than 10 µm, preferably 50 µl. Such particle suspensions may be obtained.

The method described in the aforesaid patent documents of this Applicant and using documentary evidence.

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2 «Purpose® for better excellence ^: pbdst The invention will now be foreground. But the realities of its design do not in any way compromise the ideas of the invention. · '·.'

For injection into fine soils having a propuetethet of ⁴ pieces ^1, a water jet of Etruscan dust having a maximum particle size of 10% and thus the suspension could be obtained by centrifugation or decantation. born of Etruscan dust in this suspenel, · is 250 kg per 1 » ^of water ·

It forms a fumed silica base by introducing 0.9% by weight of fine ground-strength silica of 35-37 ° B. This solution has a solar ratio of cetyl oxide to sodium oxide of 0.02. '<·>'.

Further, a suspension of olemite * is formed. Its particles have a velocity of from 0 to 10.0 ®, and more than 350 kg per 1? water.

Then, a cshq team is created *.

As described above, 400 l of a dolomite slurry as described above. 360 l silica solution described above 29. 1 diapering 'reagent' (melanin 'solution) Ô 1

The pSo thus obtained contains 100 kg of Etruscan and 200 kg of dolomite, ie a total of δ 300 kg dry

The setting time is the axis for 1 h ^ sweating does not exceed 51. The slurry I capable votPikovánído sand which is propustnoet 1O ~ ⁴ ϊ0.® ~ \ '

In production, the pH has a pH of 13 * 2, which after solidification drops to 12.2.

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The slurry pressure is 7 kg.cm after 7 days.

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The erosion of the standing soils as in Example 1 was formed by ducks.

jŕuspenze otrusky popôsná of Example 1 200 * 1 'unptsnze dolomite popsšná the pMkledu 4 1> 0 1 oxide solution and a solution of kŕemíCltáhá fashion similar to Example 1 but the molar ratio of carbon pomSreá'ltíPemldÍtéhô''kU Oxide eodnánu equal to 0.3 ^{X 29} · ^1. 'water -..- ¾ ·· 340 1

This is how it ends with kilograms of swab and 190 kg of dolomite, 200 kg of dry matter per kg.

This vats have a setting time of 30 minutes and a sweating of menfire no δ 55U

This slurry is suitable for flushing into the sand 10 ~ ⁴ Ea ^-1 . ί mkiau, v ', for off-blowing by blow-throughs around the permeability around

10 ~ ⁴ ~ ®.s \ suspenzeprachu Etruscan was made, the Cástlce roají granulometrll obeaäehou meal; 0 / s. lO ^ um. This suspension _; containing 250 kg Etruscan _S: t ^^. 'Jata' »· The three Etruscan maria be zíekáns odstfédSním or ^ 'žúsátánía, ip ^ áoby that the Jií bylyvýôe.

The particles are produced having granulometers between 0 and 10 [deg.]. This euepension; 'oáeaíwje'_; ^? 25 kg of Truscan per ml of water. The granulomethyl ethers are obtained by decanting or settling to form more elongated crystals ^; . ^; bi54y? yýMe pOpsány. ·. / ··

The robapenzétaOtWa Wetlce kaliiá produced, granulometrli between 0 and 10 / and a? 50 tons of calcite per 1 t? water.

The orthophylic erythrocyte selected from the above-mentioned oleo-calcium calcine has a solution of about 400% of the silica and anilignic flow, but with a mole of oxide ^; W> sodium salt, G '29 1 water' 340 V dolococation reagent (naphthalene tetrahydrate) 6 1

The slurry obtained has a concentration of 50 kg and a calcite of 150 kg, i.e. 200 kg of dry matter per ml.

deji setting time is ih · 30 _; : 'Lh £'_; , de her. jprotation · is aal yož ·.

Kade has žpoCátkupH; V0nápo solidified drops, ťevnoat after 7 dneeh .. I / .5 ^'; and E, J t '- ^' ^ · R *

Example 4 '.λ: />?;;;··'',' · '.'' ^1. '

For βρβνηδηί alluvial soils possessing propuatnoet from ⁴ * ⁴ άο 1O ~ ³ as ” ¹ , suspension suspensions are produced, but they have ľV

Claims (11)

1. An injection mold for impregnation and / or hardening or materials having low permeability, of the type consisting of siprachus suspended in water and with a solution of sulfur dioxide to a lesser extent, the solution of the oxide is less than that of the oxide. not # 0.8 and Obeah of cfeal yellow oxide from 0.01 to 5% by weight · - /, 2 2. The slurry according to step 1, above, has a silica content of about 0.5% by weight of carbon dioxide. 3. The slurries according to any of these are characterized by the dust being an Etruscan valikate. 4. The slurry according to any of the X-ray extracts has a size of at least 10000, preferably at least 90 µm. 2. '·; 5. The slurry according to any one of Claims 1 and 4 &apos; 6. The slurry according to clause 5 contains an inert filler. 7. The slurry according to clause 5, which is said to contain a binder, such as magnesium carbonate or double carbon Si. j. . C · ·. ι. ; ,. , tan-calcium (dolomite) · 8. A slurry as claimed in claim 5, comprising a filler and a calcium carbonate or carbonate. 9. The duck according to claim 1, characterized in that it comprises 2e Fine cement · í ': ^' 10. zpúseb production kaši®podie? Ktsrihoi »If the stabs 1 to 4 _r ee vysnačující by Se ee s®íeM'Í'ptó &_A; ^ Yeokopecní'.eirúaky. Dissolved in vgd ########### STR1 ## the Rostoke® silica reagent. In particular, in the form of a flow of 39 '' and ''''^; Silica bobo / v λ / μΐ ^1. ·· '*' ^x Í '. The siliceous material _is mixed _{with a} silicon-phenoxane-Cm-1 / O / C, preferably preferably one. 11. A method according to claim 6, wherein the binder suspension is added or is added.